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Article
Engineering
Civil Engineering

Catarina Relvas

,

Giancarlo Marulli

,

Carlos Moutinho

,

Elsa Caetano

Abstract: This work explores the key capabilities of emerging sensing technologies in the context of Structural Health Monitoring (SHM) of civil infrastructures, aiming at contributing to the research on integrated and intelligent systems for more accessible and efficient monitoring solutions. As a case study, this study focuses on analysing the static and dynamic behaviour of the Edgar Cardoso stay-cable Bridge during its rehabilitation, recurring to a fully customized transducers and equipment. The developed system integrates sensors capable of measuring accelerations, displacements and temperature, which are connected to an autonomous data acquisition and transmission network. A digital interface was also developed to store, process and visualize the collected data, allowing remote access for later interpretation and analysis. The results confirmed the effectiveness of the developed system, which enabled the identification of the dynamic properties of the structure in terms of natural frequencies and vibration modes. The effects of traffic loads, as well as the correlations between temperature and structural displacements were also identified. Furthermore, the estimation of the axial forces in the stay cables permitted to study the influence of wind actions and traffic loads in these elements. The results demonstrate the potentialities of customized sensing solutions as effective tools for the management, maintenance, and long-term preservation of strategic infrastructures.

Article
Engineering
Mechanical Engineering

Mohammad Raquibul Hasan

,

Michele John

,

Wahidul K. Biswas

,

Ian J. Davies

,

Alokesh Paramanik

Abstract: Additive manufacturing is increasingly promoted as a pathway toward sustainable production; however, its Environmental, Social, and Governance (ESG) implications remain insufficiently defined at the operational level. This study addresses this gap by developing a governance implications assessment framework to interpret empirically validated life cycle sustainability assessment (LCSA) evidence for post-consumer recycled polylactic acid (PC-PLA)-based fused filament fabrication (FFF) within the Australian manufacturing context. The central contribution lies in demonstrating how LCSA evidence can be translated into decision-relevant ESG information without reliance on product declaration frameworks or simplified circularity claims. While LCAs and EPDs do not directly optimise production systems, sustainability-oriented governance can guide engineering and operational decisions by managing whole-system trade-offs and future risk. The framework integrates mechanical validation, service-life-normalised LCSA results, circularity metrics, and material flow modelling through a consequences analysis lens. Results indicate that a V50:R50 (vPLA:PC-PLA) blend achieves balanced performance, delivering a 57% reduction in global warming potential while maintaining functional durability. However, these benefits are governance-contingent; managing an 11.7% increase in service-life-normalised costs requires senior-level oversight, formalised material traceability, and structured workforce training. Waste diversion analysis further demonstrates that scalability is constrained primarily by upstream collection and sorting efficiency rather than fabrication performance. The study concludes with a strategic roadmap advocating regional recycling hubs, certified micro-credentials, and adoption of decision-relevant governance metrics aligned with ASRS S1 and S2 disclosure standards. The proposed framework offers a transferable approach for translating engineering-level sustainability evidence into credible governance insights, strengthening accountability and supporting Australia’s transition toward resilient, circular manufacturing.

Article
Engineering
Civil Engineering

Abba Ibrahim

,

Aimrun Wayayok

,

Helmi Zulhaidi Bin Mohd Shafri

,

Noorellimia Mat Toridi

Abstract: The Gravity Recovery and Climate Experiment (GRACE/GRACE-FO) missions provide terrestrial water storage anomalies (TWSA) at coarse spatial resolution (300 km), limiting their application in medium-sized basins. This study develops a machine-learning framework to enhance the spatial interpretability of GRACE mascon TWSA within the 48,000 km² Hadejia-Jama’are River Basin, Nigeria. Hydroclimatic predictors derived from TerraClimate, Global Land Data Assimilation System (GLDAS), and Climate Hazards Group InfraRed Precipitation with Stations (CHIRPS) were integrated within a unified 4 km spatial framework. Four machine learning models were evaluated, including Random Forest (RF), Gradient Boosting, Histogram Gradient Boosting, and a Multi-Layer Perceptron. The RF model achieved the highest skill in reproducing mascon-scale TWSA (R² = 0.937; NSE = 0.937; RMSE = 4.36 cm). Aggregation of the 4 km fields back to the mascon scale preserved basin-integrated mass (R² = 0.94), confirming consistency with the original GRACE signal. The resulting groundwater storage anomaly (GWSA) fields resolve sub-basin spatial gradients and seasonal recharge-depletion cycles that are not discernible in the native product. Validation against 31 monitoring wells yielded moderate temporal agreement (Pearson correlation coefficient, r = 0.656), with magnitude discrepancies attributable primarily to scale mismatch and hydrogeological heterogeneity. While not a substitute for in-situ monitoring, the downscaled product enhances basin-scale groundwater assessment in data-scarce semi-arid regions. The framework is transferable to comparable basins and supports regional drought monitoring and water-resource management.

Article
Engineering
Electrical and Electronic Engineering

Ruihao Ma

,

Qingle Pang

Abstract: To address the issue of low accuracy of faulty feeder detection methods based on single fault characteristics, a faulty feeder detection method for resonant grounding systems based on multiple transient characteristics fusion was proposed. First, the transient zero-sequence current fault characteristics of both faulty and healthy feeders during single-phase-to-ground (SPG) faults were analyzed. Then, the transient zero-sequence current of each feeder was decomposed into intrinsic mode functions (IMFs) using variational mode decomposition (VMD), and a new signal was constructed by combining IMF1 and IMF2. Subsequently, transient energy and waveform similarity fault characteristics were extracted from the constructed signal, and a faulty feeder detection criterion based on multiple transient characteristics fusion was developed. Finally, extensive simulations and field data were used to verify the proposed faulty feeder detection method. The results demonstrated that the method was robust against fault resistance, fault inception angle, fault location, and noise, achieving high accuracy in faulty feeder detection. This method can be widely applied to detect faulty feeders in resonant grounding systems.

Review
Engineering
Bioengineering

Panangattukara Prabhakaran Praveen Kumar

,

Dong-Kwon Lim

,

Taeho Kim

Abstract: Photoacoustic imaging (PAI) is an emerging hybrid biomedical imaging modality that combines the high molecular contrast of optical excitation with the deep tissue penetration of ultrasound detection. This review presents recent advances in PAI-based techniques for the detection and characterization of gynecological and gynecological diseases in women, with particular focus on endometriosis and uterine-related disorders. We summarize the application of PAI across preclinical and translational studies, highlighting progress in photoacoustic microscopy, spectroscopic photoacoustic imaging, and endoscopic and probe-based implementations for noninvasive, high-resolution tissue evaluation. The role of functional and contrast-enhanced PAI approaches is discussed, emphasizing their ability to enhance diagnostic sensitivity, enable longitudinal monitoring, and provide detailed information on vascular, biochemical, and structural tissue characteristics. Furthermore, the expanding applications of PAI in assessing uterine, cervical, and ovarian pathologies, including tumor detection and tissue remodeling, are reviewed. Finally, current challenges, limitations, and future directions toward clinical translation are addressed. Collectively, this review underscores the potential of photoacoustic imaging as a powerful, noninvasive platform for early diagnosis, disease monitoring, and improved management of women’s health conditions.

Article
Engineering
Civil Engineering

Md Golam Sarwar

Abstract: Regulated river corridors downstream of large dams face competing geomorphic pressures: sediment starvation and channel incision (the hungry water effect) and episodic tributary-driven aggradation during floods. Quantifying their net balance over multi-decadal timescales is essential for flood risk assessment and sediment management. This study presents the first LiDAR-based DEM of Difference (DoD) analysis of the 21 km Loire river corridor downstream of the Villerest dam (constructed 1984, France), using co-registered DEMs from 2003 and 2022 (19-year monitoring period). A uniform minimum level of detection (minLoD) of 0.10 m was applied, consistent with airborne LiDAR vertical accuracy (±0.05–0.15 m RMSE). The corridor exhibited dominant aggradation: mean DoD = +0.172 m, net deposition volume = +300,841 m³, and mean annual vertical change rate ≈ 9.1 mm/yr. Despite sediment-starved conditions immediately downstream of the dam, net deposition dominates the corridor budget. Results are consistent with tributary sediment inputs mobilised during four major flood events (2003, 2008, 2016, 2021), though mechanistic attribution requires coupled hydrological–sediment-transport modelling. Localised erosion, restricted to 5.6% of the corridor area, reflects residual hungry water effects along channel margins. These findings provide the first quantitative morphological baseline for this regulated corridor and suggest a progressive reduction in floodplain storage capacity with implications for downstream flood risk in the Roanne agglomeration.

Article
Engineering
Aerospace Engineering

Khalid Hasan Nabil

,

Jubayer Ahmed Sajid

,

Ivan Grgić

,

Jure Marijić

,

Saiaf Bin Rayhan

Abstract: Bird strike events on rotating jet engine fan blades pose significant risks to aviation safety, yet high-fidelity numerical simulations remain computationally expensive, limiting their use in parametric design studies. This study develops a physics-informed machine learning surrogate framework for predicting bird strike response on rotating Ti-6Al-4V fan blades, systematically comparing Lagrangian (gelatin-based, Mooney–Rivlin) and Smoothed Particle Hydrodynamics (SPH, water-like) formulations. A total of 100 explicit dynamic simulations were conducted in ANSYS LS-DYNA (50 per formulation), varying bird impact velocity and blade angular speed. Random Forest, Support Vector Regression, Polynomial Regression, and XGBoost regression models were trained and evaluated using five-fold cross-validation. Results demonstrate that SPH-based surrogates achieve superior predictive accuracy, with Random Forest yielding R² = 0.9938 for maximum deformation and R² = 0.9962 for total energy dissipation. In contrast, Lagrangian-based stress surrogates exhibited severe performance degradation (R² = 0.24) due to mesh-dependent numerical noise. The trained surrogates achieved computational speed-up factors of 10⁴–10⁵ relative to direct simulation. These findings establish that surrogate model reliability is fundamentally governed by the numerical quality of the training data, providing guidance for integrating machine learning with impact simulation workflows in aero-engine blade design.

Article
Engineering
Civil Engineering

Hussein Hamel Zghair

,

Iman Kattoof Harith

,

Tholfekar habeeb Hussain

Abstract: Conventional concrete faces limitations such as brittleness, low energy absorption, and a significant environmental impact due to its reliance on natural resources. Integrating natural fibers (NF) and recycled coarse aggregate (RCA) into concrete presents a promising avenue for enhancing both performance and sustainability. However, accurately predicting the strength of these innovative concrete mixtures remains challenging. This study investigates the predictive capabilities of two machine learning (ML) models: Classification and Regression Trees (CART) and Stepwise Polynomial Regression (SPR), in forecasting the compressive and splitting tensile strength of NF-reinforced concrete incorporating RCA. Results unequivocally demonstrate the superior predictive accuracy of the CART model. CART exhibited significantly higher R-squared values and lower error metrics (RMSE, MAD, MAPE, MSE) for both compressive and splitting tensile strength. For compressive strength CART achieved R² = 0.91, RMSE = 5.5686, MSE = 31.0098, MAD = 4.1076, and MAPE = 0.1055, while for splitting tensile strength, it achieved R² = 0.89, RMSE = 0.3954, MSE = 0.1563, MAD = 0.2996, and MAPE = 0.0939. These findings underscore the significant potential of ML, particularly CART, in optimizing the design of sustainable concrete structures by enabling more precise and efficient strength predictions, ultimately contributing to more sustainable and resilient infrastructure.

Article
Engineering
Electrical and Electronic Engineering

Yuan Liu

,

Taishan Xu

Abstract: In this paper, a short-term active power curtailment (ST-APC) strategy for doubly fed induction generator (DFIG) wind farms is proposed to enhance first-swing rotor angle stability under fault disturbances. While wind power is a clean renewable resource that is widely deployed, its large-scale integration heightens concerns about transient stability. After analysing DFIG operating principles, this study advocates for using short-horizon active power control to mitigate the adverse stability impacts of wind farms. Using the Western System Coordinating Council (WSCC) three-machine nine-bus test system, the effectiveness of the ST-APC strategy across diverse operating conditions is verified. Simulation results show that, following a fault, modulating the DFIG’s active output effectively suppresses the first swing, postpones loss of synchronism, and increases the critical clearing time (CCT). The scheme yields notable benefits regarding improvements in overall stability, reductions in the frequency nadir, and acceleration of frequency recovery. Sensitivity analyses further examine the effects of activation time, control duration, and curtailment depth on CCT and offer tuning recommendations. The findings indicate that the proposed strategy is practical and adaptable, making it suitable for power systems with high wind power penetration.

Review
Engineering
Bioengineering

Paola Negrón

,

Jairo Rondon

Abstract: End-stage lung disease represents a major challenge in modern medicine. Lung transplantation remains the most effective treatment; however, donor shortage and rejection significantly limit its clinical impact. The engineering of bioartificial lung grafts using patient-derived cells may lead to new therapeutic strategies. Advanced culture conditions enable the formation of functional three-dimensional tissues from lineage-committed cells. Currently, bioartificial grafts capable of gas exchange have been created and transplanted in animal models. Ongoing challenges in tissue engineering include the development of ideal scaffolds and the full maturation of engineered structures to ensure graft longevity after in vivo implantation. With collaborative efforts, the goal is to design patient-derived lung grafts and achieve clinically relevant translational milestones such as airway grafts and disease models.

Article
Engineering
Marine Engineering

Francisco Javier Córdoba-Donado

,

Vicente Negro-Valdecantos

,

Gregorio Gomez-Pina

,

Juan J. Muñoz-Pérez

,

Luis J. Moreno Blasco

Abstract: Marine Spatial Planning (MSP) and Terrestrial Spatial Planning (TSP) have traditionally evolved as disconnected systems, limiting the capacity to address coastal dynamics under climate change. This article proposes Integrated Spatial Planning (ISP) as a governance and planning framework that links marine and terrestrial domains through a multi-level zoning structure operating from municipal to international scales. The approach explicitly incorporates climate change adaptation by aligning spatial planning instruments with marine climate drivers, hydrological processes, and environmental dynamics that shape coastal resilience.The methodology is applied to the Region of Murcia, Spain, a Mediterranean coastal system highly exposed to climate variability, sea level rise, and extreme runoff events. Despite the existence of multiple regulatory and strategic instruments, including urban plans, regional spatial law, basin-scale hydrological planning, climate strategies, and coastal management guidelines, planning remains fragmented across land and sea. The case study reveals critical gaps in the integration of climate projections, runoff and sediment dynamics, infrastructure planning, renewable energy deployment, and ecosystem-based adaptation, particularly in sensitive areas such as the Mar Menor lagoon.ISP addresses these challenges by establishing governance mechanisms that connect marine climate models, environmental dynamics, and spatial decision-making across administrative levels. The results demonstrate how ISP can improve coherence between climate adaptation strategies, ecosystem protection, and socio-economic development, offering a transferable framework for climate-informed coastal and marine spatial planning in vulnerable regions.

Review
Engineering
Automotive Engineering

Krisztian Horvath

Abstract: Electric vehicles (EVs) have fundamentally changed the noise, vibration, and harshness (NVH) landscape of automotive powertrains. In the absence of masking inter-nal-combustion-engine noise, harmonic components such as gear whine, electric-motor orders, and inverter-related tones become more perceptible and more critical to vehicle re-finement. This review synthesizes the current state of the art in harmonic NVH engineer-ing for electric drivetrains, focusing on the interactions between gear geometry, manufac-turing variability, electromechanical coupling, structural transfer, and human sound per-ception. Classical mechanisms of gear-mesh excitation are revisited together with emerg-ing EV-specific challenges, including long-wavelength flank deviations, ghost orders, lightweight housing dynamics, and psychoacoustic sound-quality requirements. The re-view further examines recent progress in predictive and data-driven approaches, includ-ing machine-learning-based gear-noise modeling, digital-twin concepts, and virtual NVH assessment workflows. Overall, the literature shows that harmonic NVH engineering in EVs is evolving from a conventional gear-noise problem into a multidisciplinary sys-tem-level task integrating gear dynamics, manufacturing science, structural acoustics, electric-drive control, psychoacoustics, and data-driven optimization. This review pro-vides a structured synthesis of these developments and identifies key research gaps and future directions for the next generation of refined electric drivetrains.

Article
Engineering
Mechanical Engineering

Nutthapong Kunla

,

Anan Suebsomran

Abstract: This study investigates the structural performance of a redesigned AAR Type E knuckle coupler using finite element analysis (FEA). The modified knuckle incorporates geometric reinforcement in critical load-bearing regions together with a hollow internal structure aimed at reducing component weight while maintaining structural integrity. Two numerical models were developed: a component level model, in which the knuckle was analyzed independently, and an assembly-level model that integrates the knuckle with the coupler body to capture realistic load transfer through contact interactions. Both models were subjected to a tensile draft load of 650,000 lbs (2670 kN) in accordance with Association of American Railroads (AAR) standards. The component-level analysis predicted peak von Mises stresses of approximately 1050 MPa, primarily concentrated near the pivot pin hole and curved pulling face regions. When contact interactions between the knuckle and coupler body were included in the assembly model, the representative peak stress decreased to approximately 950 MPa, corresponding to a stress reduction of about 10% due to load redistribution across the assembly interfaces. Highly localized stress peaks at sharp geometric edges were identified as numerical stress singularities and were excluded from engineering interpretation. The results demonstrate that assembly-level finite element modeling provides a more realistic representation of load transfer mechanisms in railway coupler systems and is essential for accurately predicting stress distribution and identifying critical fatigue-prone regions. These findings provide valuable insights for improving the structural reliability and design optimization of freight rail coupler components.

Article
Engineering
Industrial and Manufacturing Engineering

Nicolae Ioan Pasca

,

Mihai Banica

,

Vasile Nasui

Abstract: The paper presents the cutting tool-life of uncoated and DLC-coated inserts used for machining of aluminum-lithium components used in the structure of Airbus A350 aircraft. Based on the collected data, a feed-forward artificial neural network with two hidden layers was created, trained using the Bayesian Regularization (trainbr) algorithm in MATLAB. The obtained results indicate a high performance of the model, with a low mean square error (MSE) and a correlation coefficient R > 0.98, which reflects an excellent generalization capacity and a close correlation between the actual and estimated values. The regression plot and error analysis confirmed the accuracy of the predictions made by the network. The internal parameters of the algorithm, such as the gradient and μ, provided additional information regarding the optimization process.

Review
Engineering
Bioengineering

Maria Pia Ferraz

Abstract: Chronic wounds, including diabetic foot ulcers, pressure ulcers, and venous leg ulcers, remain a global healthcare burden due to persistent inflammation, impaired tissue repair, and high susceptibility to infection. The rise of antibiotic-resistant pathogens and the prevalence of biofilms in these wounds have limited the effectiveness of conventional therapies, highlighting the need for advanced strategies that simultaneously control infection and promote healing. Biomaterial-based approaches have emerged as promising solutions, offering multifunctional platforms that combine antimicrobial activity with regenerative support. Natural and synthetic polymers, antimicrobial peptide-loaded scaffolds, metal oxide nanoparticles, bacteriophages-loaded biomaterials and hybrid composites have demonstrated the ability to disrupt biofilms, deliver targeted therapeutics, and create environments favorable for cell proliferation and tissue repair. Recent innovations emphasize “smart” biomaterials that respond to wound-specific stimuli, controlled-release systems for sustained drug delivery, and bioinspired materials that mimic native tissue architecture. The integration of electrospinning, 3D bioprinting, and surface functionalization has further advanced the design of next-generation wound dressings. This comprehensive review explores how biomaterials combat infection in chronic wounds, evaluates their clinical translation, and discusses barriers such as cytotoxicity, scalability, and regulatory challenges. Finally, it outlines future directions for personalized, biomaterial-based wound care that supports antimicrobial stewardship and improved patient outcomes.

Article
Engineering
Electrical and Electronic Engineering

Shrenik Jadhav

,

Birva Sevak

,

Van-Hai Bui

Abstract: Reinforcement learning (RL) agents are increasingly deployed for voltage control in power distribution networks. However, their opaque decision-making creates a significant trust barrier, limiting their adoption in safety-sensitive operational settings. This paper presents XRL-LLM, a novel framework that generates natural language explanations for RL control decisions by combining game-theoretic feature attribution (KernelSHAP) with large language model (LLM) reasoning grounded in power systems domain knowledge.We deployed a Proximal Policy Optimization (PPO) agent on an IEEE 33-bus network to coordinate capacitor banks, tap changers, and shunt regulators, successfully reducing voltage violations by 90.5% across diverse loading conditions. To make these decisions interpretable, KernelSHAP identifies the most influential state features. These features are then processed by a domain-context-engineered LLM prompt that explicitly encodes network topology, device specifications, and ANSI C84.1 voltage limits.Evaluated via G-Eval across 30 scenarios, XRL-LLM achieves an explanation quality score of 4.13/5. This represents a 33.7% improvement over template-based generation and a 67.9% improvement over raw SHAP outputs, delivering statistically significant gains in accuracy, actionability, and completeness (p< 0.001, Cohen’s d values up to 4.07). Additionally, a physics-grounded counterfactual verification procedure which perturbs the underlying power flow model, confirms a causal faithfulness of 0.81 under critical loading.

Article
Engineering
Industrial and Manufacturing Engineering

Amparo Coiduras-Sanagustín

,

Eduardo Manchado-Pérez

,

César García-Hernández

Abstract: (1) Background: Privacy usability in IoT smart home companion applications remains an underexplored domain despite mounting regulatory requirements and accelerating user adoption. Heuristic evaluation offers a scalable pathway to privacy usability assessment, yet validated frameworks for applying such methods in real industrial settings are scarce. This study presents the first empirical application of the ABCDE Privacy Framework, a ten-heuristic instrument grounded in Nielsen’s usability principles and Privacy by Design, to an IoT companion application developed with a major European home appliance manufacturer. (2) Methods: A structured workshop was conducted with a multidisciplinary team of seven participants (five industry professionals and two researchers) following a two-round protocol: a qualitative heuristic discussion phase (Round 1) and an individual scoring phase (Round 2). Data were analysed through MAXQDA. (3) Results: Average heuristic scores ranged from 3.6 (H9: error recovery) to 4.8 (H6: recognition; H10: documentation), with an overall mean of 4.32. Six second-order themes were identified, including Transparency Asymmetry, Centralised but Decontextualised Privacy, and Shared Household Complexity. (4) Conclusions: The ABCDE Privacy Framework is feasible, time-efficient, and analytically productive in real industrial contexts, generating design-relevant insights and enabling cross-role team alignment within a two-hour session. These findings support its potential as a scalable tool for Privacy by Design practice in IoT product development.

Article
Engineering
Transportation Science and Technology

Alisher Baqoyev

,

Azizjon Yusupov

,

Sakijan Khudayberganov

,

Bauyrzhan Sarsembekov

,

Utkir Khusenov

,

Aleksandr Svetashev

,

Shokhrukh Kayumov

,

Muslima Akhmedova

,

Mafratkhon Tokhtakhodjayeva

Abstract: The main objective of the study is to reduce the dwell time of wagons at stations and to improve the efficiency of shunting locomotive utilization. The problem has a combinatorial nature, since an increase in the number of loading and unloading fronts leads to a sharp growth in the number of feasible service variants. During the research, a mathematical model describing the servicing process of industrial sidings was developed. The study addressed the problem of determining the optimal sequence of wagon deliveries and the optimal distribution of workload among shunting locomotives. Under conditions where two or more shunting locomotives are used, an optimization method based on the indicator of wagon-hours reduction (σ) was proposed for allocating loading and unloading fronts. Using combinatorial properties, it was shown that many possible allocation variants are symmetric, which allowed the development of a mathematical solution that simplifies the search for an optimal solution. Computational results demonstrated that, at the hypothetical railway station “N-1”, applying the optimal service sequence reduces wagon dwell time by 21% compared with an arbitrary sequence. At the hypothetical station “N-2”, distributing wagon groups between two shunting locomotives improves the efficiency of the servicing process by 26% compared with using a single locomotive. Based on the proposed mathematical model and algorithm, a practical software tool was developed that enables the automatic determination of service sequences for loading and unloading fronts. The software allows the identification of optimal servicing orders, analysis of alternative variants, and evaluation of the efficiency of shunting locomotive utilization.

Article
Engineering
Transportation Science and Technology

Jannatul Ferdouse

,

Simone Ehrenberger

,

Christian Wachter

,

Mohamad Abdallah

Abstract: The CO2-emissions are rapidly rising with new records and the transport sector is considerably contributing to GHG emissions. The critical transition towards electrification and sustainable development demands a radical change in the transport industry. One of many solutions is to analyze the environmental benefits of optimized vehicle production and recycling of the vehicle components after its usable life to reduce dependency on limited raw materials. Electric motor is one of the most crucial powertrain components, yet studies on the overall ecological profile of production and end of its useable life is limited. This study examines the life cycle assessment (LCA) impacts of electric motors used in passenger cars and potential recycling of its materials. The analysis covers production and recycling of components, crucial elements, and permanent magnets. The results show that housing and rotor production have the highest impacts mainly due to steel, aluminum and permanent magnets. The findings discuss e-motor recycling innovations, state-of-the-art methods and emission reduction potentials of recycling. This paper also covers the understanding that a significant transformation to optimize the resource consumption in manufacturing of crucial vehicle powertrain component and reduce waste after end-of-life could bring combined ecological advantages.

Article
Engineering
Industrial and Manufacturing Engineering

Berend Denkena

,

Henning Buhl

,

Bengt Torben Gösta Rademacher

Abstract: Rising energy costs and strict CO₂ traceability regulations create demand for monitoring energy and CO₂ emissions in manufacturing. This paper presents a framework for modelling component-wise energy models with deployable accuracy. In many factories, power meters log data at a sampling rate of 1–2 Hz, so short start-up peaks of components are underestimated. Manufacturers want to exploit this information to support operational decisions, such as peak shaving and optimising energy contract costs. To enable data-driven decisions with limited measurement infrastructure, energy models must extrapolate component behavior from sparse data. The framework is based on power measurements in accordance with ISO 14955-3, ensuring that the load characteristics required for subsequent modelling are known. The measurements are then segmented, and regressions are fitted for each segment. As a case study considering the mist extractors of two different machine tools, the proposed segmentation achieved determination coefficients (R²) of up to 0.94 in the complex ramp-up phase. The resulting models are compact, interpretable, and suited for energy monitoring on edge devices. The contribution is a reproducible framework for delivering peak-aware, component-level energy models from low-frequency industrial power meter data.

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